LCM,
You might take a few more pics of the winch and try this outfit http://www.koenigwinches.dk/koenigwinches-in-english.html
After a short Google search, this seemed to be about the best choice. .
In reading the Danish site ol Grump found, the site owner mentions that Koenig Iron Works merged with Rawson Industries to become RKI in 1987... googling Rawson Koenig Winch gets you to their winch page at http://rki-us.com/products.aspx?catid=4
The datasheets on there don't have anything that relates to your winch on the 22, but it at least gives you the follow-on company to contact:
RKI, Inc.
2301 Central Parkway
Houston TX 77092
Phone: 713.688.4414
Toll-Free: 800.346.8988
Email: [email protected]
Best of luck, LCM!